Y geiriadur mawr
Subtitle: the complete Welsh-English, English-Welsh dictionary
By: H. Meurig Evans, W.O. Thomas / golygydd ymgynghorol = consulting editor Stephen J. Williams.
Contributors: Thomas, William Owen.; Williams, Stephen J. 1896-
Edition: 13 argraffiad.
Publisher: Gomer
Published: 1986
Place of publication: Llandybi e
Language: mul
Number of pages: 492
Notes: Previous ed. 1985.